The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 06, 1981
Filed:
Nov. 09, 1979
Peter W Hamilton, Cincinnati, OH (US);
William P Lewis, Westchester, OH (US);
The Procter & Gamble Company, Cincinnati, OH (US);
Abstract
An air treating device in which the exhaustion of the operative fluid is visually signaled by a run-out signal system. The operative fluid and an immiscible signal fluid are held in a reservoir having associated therewith a substrate that selectively first wicks the operative fluid onto the evaporative surface portion of said substrate and, when the operative fluid is substantially depleted, the substrate then transports the signal fluid to the evaporative surface. The signal fluid is of a different hue from the operative fluid to provide an easily observed signal denoting exhaustion of the operative fluid.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile